How do I calculate X% of Y?

Multiply X by Y and divide by 100. For example, 15% of 200 = (15 × 200) / 100 = 30. Our calculator does this instantly.

How do I calculate percentage change?

Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result is a percentage increase; negative is a percentage decrease.

How do I find the original price after a percentage discount?

Original Price = Discounted Price / (1 - Discount%). For example, if an item costs ₹850 after a 15% discount, the original price was 850 / 0.85 = ₹1,000.

What is the percentage difference between two numbers?

Percentage difference = |Value1 - Value2| / ((Value1 + Value2) / 2) × 100. This is different from percentage change as it doesn't assume one value is the "starting" point.

How do I add a percentage to a number?

To increase a number by X%: New Value = Original × (1 + X/100). For example, adding 10% to 500: 500 × 1.10 = 550. Use our calculator to find this instantly.

Percentage Calculator - Calculate % Online Free | ToolsArena

How to Use Percentage Calculator

1
Choose the type of percentage calculation you need from the tabs.
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Enter the numbers in the input fields provided.
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The result updates instantly as you type.
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Read the step-by-step explanation below the result to understand the math.
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Switch between calculation types without losing your inputs.

About Percentage Calculator

Percentages are everywhere — discounts, taxes, interest rates, exam scores, statistics — and our Percentage Calculator makes every type of percentage calculation simple and fast. The tool covers all common percentage problems in one place: finding X% of a number, calculating what percentage X is of Y, finding the original number before a percentage increase/decrease, and calculating percentage change between two values.

Students use it for calculating grade percentages and exam scores. Shoppers use it to calculate sale discounts and final prices. Accountants and business owners use it for profit margins, tax calculations, and growth rates. The tool shows step-by-step working for each calculation, so you understand how the result was reached.

All calculations happen instantly in your browser. No ads blocking your results, no popups, no account required. Just fast, accurate percentage math.

Percentage Calculator